This week, five Machinery stocks are improving their overall ratings on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

Alamo Group (NYSE:ALG) is bumping up its rating from a C (“hold”) to a B (“buy”) this week. Alamo Group is a designer, manufacturer, distributor, and service provider for high-quality equipment for right-of-way maintenance and agriculture. In Portfolio Grader’s specific subcategory of Cash Flow, ALG also gets an A. Shares of ALG have increased 8.9% over the past month, better than the 2.1% increase the S&P 500 has seen over the same period of time. For more information, get Portfolio Grader’s complete analysis of ALG stock.

This week, Tecumseh Products (NASDAQ:TECUA) is making solid headway. The company’s rating improves to an A (“strong buy”) from last week’s B (“buy”) rating. Tecumseh Products is a full-line, independent, global manufacturer of hermetically sealed compressors for residential and commercial refrigerators, freezers, water coolers, dehumidifiers, window air conditioning units and residential and commercial central system air conditioners and heat pumps. Investors seem to agree with the upgraded status of the stock, and have pushed the stock up 24.5% over the past month. For more information, get Portfolio Grader’s complete analysis of TECUA stock.

This week, Wabtec’s (NYSE:WAB) ratings are up from a B last week to an A. Westinghouse Air Brake Technologies is a provider of value-added, technology-based products and services for the global rail industry.

For more information, get Portfolio Grader’s complete analysis of WAB stock.

This is a strong week for Watts Water Technologies (NYSE:WTS). The company’s rating climbs to B from the previous week’s C. Watts Water Technologies designs, manufactures and sells a line of water safety and flow control products for the water quality, water conservation, water safety and water flow control markets. Investors have pushed the stock price up 7.9% over the past month. For more information, get Portfolio Grader’s complete analysis of WTS stock.

Energy Recovery (NASDAQ:ERII) earns an A this week, jumping up from last week’s grade of B. Energy Recovery develops and manufactures energy recovery devices utilized in the water desalination industry. Wall Street has pushed the stock higher by 24.7% over the past month. For more information, get Portfolio Grader’s complete analysis of ERII stock.

Louis Navellier’s proprietary Portfolio Grader stock ranking system assesses roughly 5,000 companies every week based on a number of fundamental and quantitative measures. Stocks are given a letter grade based on their results — with A being “strong buy,” and F being “strong sell.” Explore the tool here.